318 no oil pressure

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Re: 318 no oil pressure

Post by mikeandanne » Sat Sep 21, 2019 10:19 am

Josh, before you spend more money on changing the lifters, make sure that is the problem first, it may not be. Take the intake off and check the diameter of the lifter bores and compare to the diameter of the lifters you installed.

Post the results of your measurements, this needs to be fairly exact, so dial/digital calipers or micrometer only in thousanths. Sorry man but this is THE only way to be sure what is what.

The lifters can be ordered in oversize ranges as the clearance is critical for oil control. Please double check all this as I am going by memory here.

Also because Mopar uses a rocker shaft , the only adjustment for the lifter compression is the pushrod, the length is critical to get the right lifter compression.
Engines are engines, good luck man.
78 F 32

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Re: 318 no oil pressure

Post by mpjosh2001 » Sat Sep 21, 2019 10:44 pm

prowlersfish wrote:
Sat Sep 21, 2019 9:43 am
Are you raw water cooled or do you have coolant ?
Its raw water cooled.

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Re: 318 no oil pressure

Post by Tight Fittn » Fri Nov 08, 2019 11:58 am

First off I'm not a mopar guy, the 318 in my Trojan is my entrance into the mopar world. However, I have experienced this very issue with a small block Ford. The symptoms were exactly the same as yours, oil present in all galleys and bearings however no pressure. The cause ended up being an oil galley plug that wasn't set correctly and let loose on initial startup. I have no idea were Chrysler put there oil galley plugs but that's what I would look for.
Keep us posted.

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Re: 318 no oil pressure

Post by mrjake56 » Fri Nov 15, 2019 5:24 am

Small block Chryslers have a “hidden” oil galley plug at the back end of the left bank oil galley that feeds the lifters. On the rear of the block, where you might expect the galley plug to be, is a large threaded plug. If you remove the distributor and look in the hole where the large was removed you should see a smaller plug in the end of the oil galley that gets installed from the rear before the large plug is installed. I have seen Ford and Chevy guys leave this plug out and the same problem you describe. It should not be an issue unless you tore the engine completely down and sent the engine block to be cleaned. I’m not sure if you can see the plug by looking in the distributor hole or if the intake manifold woul need to be removed.

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